140 PROCEEDINGS OP THE NATIONAL MUSEUM. vol. xxxii. 



whorls. The suniniits of the whorls and the i-ounded shoulders arc 

 marked in addition to the above-mentioned s<-ulpture with oblique 

 wrinkles, which give this part of the whorls a quite strongly malleated 

 appearance. Periphery of the last whorl angulated. Base short, some- 

 what inflated, well arched, excavated about the narrow open uml)ilicus 

 and marked l)y ten sul)equal and irregularly spaced slender spiral lira- 

 tions, between which there are many exceedingly tine interrupted papil- 

 lose spiral lines. Aperture oval, bluish wdiite within, bordered by a very 

 narrow black edge on the outside; outer lip thin; columella concave, 

 slender, somewhat expanded at the base and slightly reflected over the 

 umbilicus; parietal wall covered with a thin callus; operculum orange, 

 with depressed eccentric nucleus marked by man}^ lines of growth. 

 The type and seven specimens, Cat. No. 192559, U.S.N.M., were col- 

 lected by Major Mearns in Lake Lanao, Mindanao. It has lost the 

 first two nuclear whorls. The five which remain measure: Altitude, 

 31.1 mm.; greater diameter, 24.1 mm.; lesser diameter, 22 mm.; 

 aperture, altitude (from the posterior angle to the middle of the l)ase), 

 15.3 mm.; diameter (at right angles to the last, from the middle of 

 the outer lip), 12.5 mm. 



VIVIPARA MINDANENSIS BAGANGENSIS, new subspecies. 

 Plate XI, fig. 12. 



Shell much more globose than V. mindanensis^ dark olive green, 

 with a reddish tinge. Interior of aperture reddish brown. Spire 

 and base marked by more or less equally spaced fine spiral lirations 

 and weakly developed obliquely forward slanting folds, which lend 

 the last two turns a malleated appearance. In addition to the spiral 

 lirations visible to the unaided eye there are many closeh^ spaced, more 

 or less interrupted, very tine, wavy lines which can l^e seen under the 

 microscope. Base well rounded and narrowly umbilicated. 



The type, Cat. No. 192979, U.S.N.M., was collected by Maj. E. A. 

 Mearns in Baganga River, Surigao, Mindanao. It has six whorls (the 

 first being decidedly worn) and measures: Altitude, 22.8 mm. ; greater 

 diameter, 19.3 mm.; lesser diameter, IT mm.; aperture (from the pos- 

 terior angle to the base of the columella), IS.S mm.; diameter (at 

 right angles to the last, at the middle of the outer lip), 10.3 mm. 



VIVIPARA BULUANENSIS, new species. 



Plate XI, fig. 15. 



Shell thin, subturreted, broadl}' conic, light brown, shining. All 

 the whorls inflated and well rounded, with a broad rounded shoulder 

 at the summit. Sutures strongly impressed. Periphery of the last 

 whorl with a mere indication of an angulation. Base short, well 

 rounded, rather broadly openl}^ umbilicated. The entire surface, both 

 on the spire and on the base, marked by many moderately strong lines 

 of growth, and many fine equally developed and snbequally spaced 



